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Finding the Fourth Proportional to 664,796.25, 917,421.30 and 362,990.25

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Solution

The fourth proportional to 664,796.25, 917,421.30 and 362,990.25 is: 500,927.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,796.25 : 917,421.30 = 362,990.25 : x
  2. Step 2: Convert to fraction form
    664,796.25/917,421.30 = 362,990.25/x
  3. Step 3: Cross multiply
    664,796.25x = 917,421.30 × 362,990.25
  4. Step 4: Simplify right side
    664,796.25x = 333,014,987,042.33
  5. Step 5: Solve for x
    x = 333,014,987,042.33/664,796.25
  6. Step 6: Final answer
    x = 500,927.90

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Half scale
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Double scale
Find fourth proportional to 664,797.25, 917,422.68 and 362,991.25
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.